Sunken Lesson Animals with Backbones

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					Sunken Lesson
 Animals with
  Backbones
    Grade 3
                Fish
• Live in water
• Most have scales and fins
• Use their fins to move through the
  water
• Use gills to breathe
            Amphibians
• Hatch from eggs laid in water
• When young, they look like fish and have
  gills like fish.
• They grow legs.
• Gills are replaced by lungs.
• They can live on land when older.
• They can stay underwater for a long time.
• Frogs, toads, salamanders, and newts are
  examples.
                 Reptiles
•   Have scales
•   Lay eggs with leathery shells
•   Most live all their life on land
•   Lay their eggs on land
•   Lizards, snakes, turtles, and
    crocodiles are examples.
               Birds
• Have wings and beaks
• Are the only animals that have
  feathers
• Lay eggs with shells
• Use their wings to fly
            Mammals
• Have fur or hair
• Give birth to live babies
• Have only a few babies at a time
• The female feeds the young milk
  from her body
• The young are taken care of for a
  long time
• Humans, dogs, horses, cows are
  mammals.

				
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posted:7/4/2012
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